Arfailasufandi, R., A. Mudigdo, and A. Sudiyanto. “The Effect of Obesity, Oral Contraceptive and Passive Smoking on the Risk of Cervical Cancer”. Journal of Epidemiology and Public Health, vol. 4, no. 3, July 2019, pp. 189-97, https://jepublichealth.com/index.php/jepublichealth/article/view/141.